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<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<title>Canvas test: 2d.text.measure.fontBoundingBox-zero-descent</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/canvas/resources/canvas-tests.js"></script>
<link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css">
<style>
@font-face {
font-family: CanvasTest-descent0;
src: url("/fonts/CanvasTest-descent0.ttf");
}
</style>
<body class="show_output">
<h1>2d.text.measure.fontBoundingBox-zero-descent</h1>
<p class="desc">Testing fontBoundingBox for OffscreenCanvas with zero descent metric</p>
<span style="font-family: CanvasTest-descent0; position: absolute; visibility: hidden">A</span>
<p class="output">Actual output:</p>
<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
<ul id="d"></ul>
<script>
promise_test(async t => {
var canvas = document.getElementById('c');
var ctx = canvas.getContext('2d');
await document.fonts.ready;
ctx.font = '40px CanvasTest-descent0';
ctx.direction = 'ltr';
ctx.align = 'left'
_assertSame(ctx.measureText('A').fontBoundingBoxAscent, 30, "ctx.measureText('A').fontBoundingBoxAscent", "30");
_assertSame(ctx.measureText('A').fontBoundingBoxDescent, 0, "ctx.measureText('A').fontBoundingBoxDescent", "0");
_assertSame(ctx.measureText('ABCD').fontBoundingBoxAscent, 30, "ctx.measureText('ABCD').fontBoundingBoxAscent", "30");
_assertSame(ctx.measureText('ABCD').fontBoundingBoxDescent, 0, "ctx.measureText('ABCD').fontBoundingBoxDescent", "0");
}, "Testing fontBoundingBox for OffscreenCanvas with zero descent metric");
</script>
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